Automobile air pump



F. FAGG. AUTOMOBILE AIR PUMP. AAPPucATloN man Mmm. 1920.

Lmg Patented Nov. 7, 1922@ I 2 SHEETS- SHEET I. l Ez Q if; Q 'v2:\\ f imI l l Rg l l 1Q 9 n N` IQ n .s Q- w Q l w I I l attente@ F. FAGG.AUTOMOBILE Am PUMP.` APPLICATION FILED MAY l0|}920.

mains-SHEET i2.

Patented N om 7, j1922;

' gwuvntoz d www4..

Patented Nov. 7, i922. l v

NETE@ ST'S Piea'iihlhiif i FRED Face, or CLINTON, iraniana.

AUTOMOBILE Ain PUMP.

Application filed May 10, 1920. Serial No. 330,139.

To all whom it may concern has a closed outer end or head 12 and is openBe it known that l, FRED Face, a citizen at its inner end, the innerends of the cylinof the United States, residing at Clinton, in ders'ofthe groups 2 and 3 being arranged in the county of Vermilion and Stateof Inopposed or facing relation. As shown, the

diana, have invented new and useful lmouter end of each cylinder isthreaded/and 60 provenients in Automobile Air Pumps, of iitted in athreaded opening 12 in the head which the following` is a specification.9, and the inner end of said cylinder pro- This invention relates to airpumps, and jects .through and is iitted within an opening particularlyto air pumps of that type de- 12a. in the head 10.

signed for use on automobiles for the pur- Arranged within each cylinderis piston 65 pose of supplying air for the inflation of 13, and thelpistons 13 of the longitudinally pneumatic tires, for the operation ofairalined cylinders of each group are connected brakes, when such areused, and for other by piston rods formovement in unison, the similarpurposes, the primary object of the pistons of the upper cylinders beingcon- 15 invention being to provide a compact form nected by the rods 14and the pistons of the 70 of air pump which may be operated by handlower ycylinders by similar rods 15, the conor by the power of theautomobile motor, and struction and arrangement `being` such that whichon each revolution of the pump shaft the .pistons of the upper cylindersof the will deliver a maximum amount of air. groups v2and 3 movesimultaneously in the The invention consists of the features of samedirection, while the pistons of the lower 75 construction, combinationand arrangement cylinders ofthe groups 2 and 3 also move of parts,hereinafter fully described and simultaneously in the same direction,the claimed, reference being had to the accomsaid two sets of pistonshowever simultanepanying drawings, in which: ously traveling in oppositedirections, as

2.5 Figure lis a ,front elevation of an air hereinafter described. 80pump constructed in accordance with my in- The crankshaft 4 is providedwith a pair ventina, of substantially U-shaped cranks 16 and 17 Figure 2is a top plan View of the same. arranged substantially at an angle of90O Figure 3 is an end elevation ofthe pump. to each other. Coupled attheir inner ends Figure 4i is a longitudinal section through to thesecranks 16 and .17 are connecting rods 85 one of the cylinders, showingthe associated 1S and 19. These rods are respectively piston, piston rodand cooperating parts. coupled at their outer ends to cross heads or Inthe practical embodiment of my invenbars 2O and 2l, the cross head 20being pivtion I provide a base 1 forming a support otally connected atits ends to the upper pisfortwo opposed groups of cylinders 2 and 3 tonrods 14, as indicated at 22, while the cross 90 andan interposedtransverse crank shaft 1l, headv or bar 21 is pivotaily connected withsaid shaft being journaled upon suitable the lower piston rods 15, asindicated at 23. bearing brackets 5 carried by the base. Each lt willthus be understood that in the revolugroup of cylinders 2 and 3comprises four tion of the crank shaft 4 the rods 11i and 15 cylinders,a `pair of parallel short cylinders will be simultaneously moved inopposite 95 6 and a pair of parallel longer cylindes i', directions, sothat when the pistons of the thecylinders of the pairs 6 and 7 of eachupper cylinders of group 2 are on their active group being disposed insuperposed relation, or compression stroke, the pistons of the a shortcylinder 6 being arranged in vertical upper cylinders of group 3 will beon their alinement with a companion long cylinder inactive or returnstroke, and vice versa, 100 7 of thesame group. while the converse willtake place as regards The cylinders of each group are mount-ed the lowercylinders of the respective groups. upon a supporting stand comprising abed By the described' construction and arplate 8 to which are suitablysecured outer rangement of the groups of cylinders. l am and innercylinder carrying disks or heads enabled to. provide a pump having`eight or 1 0 9 and `10, Said disks or heads being fixed in more workingcylinders in a compact. group, any preferred manner at their lowerportions so that a maximum amount of air may be to the bed plate 8 andbeing united at their compressed and delivered on each revolutionupperportions in any suitable manner, as by of the crank shaft il. Asthe piston rods of means of tie rods or bolts 11. Each cylinder thesimilarly arranged (upper or lower) 110 cylinders of each group arecoupled for operation by a single crank, and as the actuating cranks ofthe upper and lower cylinder rods are arranged at an angle of 90o toeach other, the cross heads 20 and 2l are pivotally coupled to the setsof rods 14 and l5 equidistantly on opposite sides of the vertical lineof the shaft 4, this arrangement producing a smooth and balancedoperation of the working parts, whereby a compact arrangement of opposedgroups each of a plurality of supcrposed cylinders is permitted. By thisarrangement each cross head 20 and 2l has reciprocating movement mainlyon one side only of the vertical line of the shaft 4, i. e., betweensuch line and the inner ends of the cooperating cylinders on such sideof the crank shaft, hence such cylinders are made comparatively short toadmit ofsuch range of movement of the cross head, while the cylindersonthe opposite side of the shaft in longitudinal alinement therewith aremade of greater length to provide for the requisite range of movement ofthe pistons therein with respect to the vertical line of the crankshaft. The two cross heads being arranged on opposite sides of thevertical line of the shaft in the manner particularly shown, the uppercylinders of group 3 and the lower cylinders of group 2 are madecomparatively short, while theupper cylinders of group 2 and the lowercylinders of group 3 are made comparatively long, allowing the pistonsin said cylinders to have a proper range of vmotion with respect to thecenter line of the crank shaft 4 according to the ar rangement of theiractuating cranks, cross heads andv connecting rods.

The outer ends of the cylinders of each group are provided with airoutlet or discharge pipes 24, and the pipes 24 of the upper and lowercylinders of each group are connected with each other by a branch pipe25 and with the approximate end of a delivery pipe 26. The pipe 26extends longitudinally of the pump and leads inwardly from the dischargeoutlets of the cylinder groups 2 and 3 and is provided at a suitablyintermediate point with a discharge outlet 27 to which may be coupled aVservice pipe 28, to which a continuous stream of compressed air will besupplied fromthe cylinders of the groups in the operation of the pump.The service pipe 28 may be a hose pipe or other suitable pipe throughwhich air may be supplied for inflating the pneumatic tires of thevehicle or for supplying air to a cylinder or reservoir of an air-brakemechanism, when such is used on the vehicle, or for supplying air forany other desired purpose.

The pipe 25 is provided with a check valve 25 between the outlets of thesuperposed sets of cylinders, to prevent the return of the airdischarged from the upper pair of cylinders and the flow of air from thelower pair of cylinders to the upper pair of cylin ders, as will bereadily understood.

In practice, the pump may be mounted at any suitable point upon thevehicle and the shaft 4 may be provided at one end with a gear 29 forsuitable connection with the crank shaft of the engine, so that it maybe operated if desired by the motive power of the vehicle, and theopposite end of the shaft may be squared or otherwise suitably formed asindicated at 30, to receive a drive crank or the like, whereby the pumpmay be operated by hand when desired or at times when the engine is notrunning. Y

It will, of course, be understood from the foregoing description that myinvention provides a double acting pump which may be operated byrotation of the crank shaft in either direction, and that, while I havespecified the pump as particularly adapted for i use upon an automobile,it may be employed within a garage or service station for the purposesdescribed and ladapted to be operated by hand or power, as desired.Instead of employing a sprocket wheel uponthe crank shaft for connectionwith asimilar wheel through a drive chain upon an engine or power shaft,it will be understood that any other suitable driving connection, suchas intermeshing gears or belt and pulley connections, may be employed inlieu thereof.

Having thus fully described my invention, l' claim:- v

In an air pump, a portable platform, cylinders grouped upon saidplatform at the ends thereof, the said groups each compris ing two pairsof cylinders arranged parallel to each other and in superimposedrelation and the cylinders of one group being axially alined with thecylinders of the other group, the upper cylinders of one set beingextended inwardly beyond the inner ends of the lower cylinders and thelower cylinders of the second set being extended inwardly beyond theinner ends of the upper cylinders, a piston in each of said cylinders,piston rods extending from one group to the otherand being connected tothe pistons of the alined vcylinders, a crank shaft mounted transverselyof said platform intermediate the ends thereof and disposed equidistantbetween the piston rods of the upper and lower cylinders, the

cranks of said shaft being disposed between the pairs of superimposedrods and said cylinders and extending at right angles to each other,bearing blocks secured to the upper and lower pairs of said rods andlaterally alined with each other, bars rockably supported at their endsin said blocks, and connecting rods rigidly connected to said bars andextending longitudinally of the piston rods in opposite directions andloosely attached to the cranks of said crank shaft. In testimony whereofI aflix my signature.

' FRED FAGG.

